Sanyo SPW-CR903GDCH8 - Page 35

II - 13
Design of W-ECO MULTI SYSTEM
2
TD831077
1. Model Selecting and Capacity Calculation
Tubing size
Main tubing size (LA, LB, LC...)
* In case that the total capacity of connected indoor unit exceeds the total capacity of outdoor unit, select
the main tubing size for the total capacity of outdoor unit.
* If the tubing expansion is expected in the future, make the tubing design with adequate
consideration for this expansion.
NOTE
Combination Capacity of Outdoor Unit
40.0 kW or more 52.4 kW or more 70.0 kW or more
less than 52.4 kW less than 70.0 kW less than 106.0 kW
Main tube size Gas tube ø38.10 (1 1/2) ø41.28 (1 5/8) ø44.45 (1 3/4)
LA Liquid tube ø15.88 (5/8) ø19.05 (3/4) ø22.22 (7/8)
70 kW or more, less than 106.0 kW
Gas tube – – ø44.45 (1 3/4)
Liquid tube – – ø22.22 (7/8)
52.4 kW or more, less than 70.0 kW
Gas tube – ø41.28 (1 5/8)
Liquid tube – ø19.05 (3/4)
42.0 kW or more, less than 52.4 kW
Gas tube ø38.10 (1 1/2)
Liquid tube ø15.88 (5/8)
30.0 kW or more, less than 42.0 kW
Gas tube ø31.80 (1 1/4)
Liquid tube ø15.88 (5/8)
16.0 kW or more, less than 30.0 kW
Gas tube ø28.58 (1 1/8)
Liquid tube ø12.70 (1/4)
9.0 kW or more, less than 16.0 kW
Gas tube ø19.05 (3/4)
Liquid tube ø9.52 (3/8)
Below 9.0 kW
Gas tube ø15.88 (5/8)
Liquid tube ø9.52 (3/8)
Unit: mm (in.)
Outdoor unit tubing size (
ll
ll
l
A
,
ll
ll
l
B
)
Power Control (PC) unit Additional (AD) unit
150 type 190 type 70 type 90 type
Wide tube
38.1 (1 1/2) 41.28 (1 5/8) 25.4 (1) 28.58 (1 1/8)
Brazing connection
Narrow tube
15.88 (5/8) 19.05 (3/4) 12.7 (1/2)
Brazing connection Flare connection
Balance tube
9.52 (3/8)
Flare connection
Distribution branch size (
ll
ll
l
1
,
ll
ll
l
2
...
ll
ll
l
32
) Unit: mm (in.)
Indoor unit type 9 type 12 type 18 type 25 type 36 type 48 type
Wide tube 12.7 (1/2) 15.88 (5/8) 19.05 (3/4)
Narrow tube 9.52 (3/8)*
* For the 25 type, use the “Tube connector” (supplied with the unit) for sizing up a narrow tube from 6.35 to
9.52.
NOTE
Unit: mm (in.)
Main tube size after distribution (LC...)